A225775 Numbers k such that antisigma(x) = antisigma(x+1) = k has solution.

0, 9, 36844389, 129894940, 446591224981504

Offset: 1

Author

Jaroslav Krizek, Jul 26 2013

Keywords

• nonn

Comments

Antisigma(n) = A024816(n) = the sum of the nondivisors of n that are between 1 and n.

Conjecture: also numbers k such that antisigma(n) = antisigma(m) = k has solution for distinct numbers n and m. - Jaroslav Krizek, Nov 10 2013

Examples

			36844389 is in the sequence because 36844389 = antisigma(8585) = antisigma(8586).
		

Crossrefs

Cf. A067816 (numbers n such that antisigma(n) = antisigma(n+1)).